Wheel.



R. J. BURROWS &: E. B. ROSS.

WHEEL. APPLIGATIOiJ FILED JUNE 1a, 1913.

b18131 90 Patented Mar.16,1915.

, ra n snares rarnnr onnron.

ROBERT J. IB'URROWS AND EDWIN B. ROSS, OF BUCHANAN, MICHIGAN, ASSIGNOBSO15 ONE-HALF TO CELFOR TOOL COMPANY AND ONE-HALF T0 BUCHANAN ELECTRICSTEEL COMPANY, BOTH OF CMCAGO, ILLINOIS, CORPORATIONS OFILLINOIS.

WHEEL.

county of Berrien and State of Michigan,

have invented certain new and useful Im-, provements in Wheels, of whichthe followmg is a specification.

This invention relates to improvements in Wheels, and particularly inwheel's designed for sustaining heavy loads, as'is the case with wheelsused on automobile trucks and similar heavy road vehicles.

It is the object of the invention to produce a strong metal wheel havingthe maximum amount of strength with the least amount of weight, and inwhich any tendency of shrinkage of the metal will be socounteracted orprovided for as to obviate any cracking or any distortion of the wheelas a whole.

These objects we accomplish as illustrated in the drawing andhereinafter specifically pointed out.

That which we believe to be new will be set forth in the claims.

In the drawing, the illustration is a central cross-section .through ourimproved wheel.

- In the illustration we have shown our invention embodied in a castmetal wheel estions of said flanges (l -d each other,

pecially designed for use as the rear wheel of a heavy truck. The wheelillustrated comprises a hub portion a and a rim 0?, the outer face ortread portion of which is adapted to receive and have secured thereto asuitable tire, not shown, said rim havingsubstantially radial orinwardly-projecting flanges (1 -03 at its marginal portions, so thattherim portion as a whole is channelshaped, and an intermediate connectingmember, which, in the illustration, is composed of two separated webportions Z -c whichextend out from the hub and are provided withoppositely-curved portions cZ-c which connect with the inner marginalporthus forming a box-like rim structure. The webs b and c in this formof the invention aresp'aced a distance apart, inclining slightly towardso that where they curve out- Specification of Lettera Patent.

Patented lvllaro 1M8, 1915..

Application filed June13, 1913. Serial No. 773,408.

ward ad inner margins of the flanges d -d substantially equidistant fromthe the wheel, and hence are properly positioned with respect'to the rimportion to afl'ord it the required support. I

The openings shown in the box-like rim admit of theremoval of the coreafter'the castingoperation. The curving outward. of the two webs, asabove referred to, is indithey are edges of cated by c" and 03,respectively, and the curved sections so indicated contribute greatly tothe commercial success and value of the wheel, due to the fact thatshrinkage strains that would tendto distort the wheel as a whole arepractically eliminated because such strains will exert their force atsuc curved sections and the slight distor.- tion there produced will notafiect the true running qualities of the wheel. These curved sectionsserve, therefore, by yielding to the shrinkage strains, to save thewheel from being subjected to such stresses as frequently lead to cracksor breaks, as in the case of metal wheels with spokes whose ends areunyieldingly held in the hub and rim, and as is also case in wheels witha such curvature. proper make we find that such curves in the Web have,to a quality which preciable resiliency in service. The making of therim of box-like shape, as shown. is also of great advantage, for thesecurved sections 6, d, forming asthey do the inner portion or open bottomof the rim and taking to themselves the shrinking strain, insure theouter face of the rim from being in any wise afiected by such strainsand consequently such face is at all times preserved perfectly shaped toreceive and hold a tire. The box-like shape of the rim insures greatstrength in itself and when to this feature solid web that has no isadded the curving of the webs where they merge into and form the innerpart of such rim we have a wheel in which the rim iselasticallysupported, and isso constituted as not to be injuriously affected by theshrinkage strains that are bound tooccur between the hub and the rim.Furthermore,

Again, with cast steel ofv acent to the rim to merge into the frequentlyfound to be the certain extent, a spring-like gives to the wheel a veryapthe whole construction lends itself to the casting of a Wheel thewalls of whose parts are comparatively thin and of uniform thickness,which features contribute very largely to reliable foundry work.

That which we claim as our invention,

and desire to secure by Letters Patent, is,

1. A metal wheel, comprising a hub, a tire-supporting rim having asubstantially flat tread portion and inwardly-directed flanges near themargins of such tread portion and integral therewith, forming anintegral annular channeled rimstructure, oppositely-disposed curvedmembers connected with said flanges and extending therefromtoward eachother, theirconvex surfaces being toward the tread, and means connectingsaid curved members with the hub.

v tire-supporting rim having a substantially 2. A metal wheel,comprising a hub, a

flat tread portion and inwardly-directed flanges near the margins ofsuch tread portion and integral therewith, forming an 1ntegral annularchanneled rim-structure, op-

positely-disposed curved members connected with said flanges andextending therefrom toward each other, their convex surfaces beingtowardthe tread, and separated members connecting said curved memberswith the huh. I

3. A cast metal wheel, comprising a hub, a tire-supporting rim having asubstantially flat tread portion and inwardly-directed flanges integraltherewith, forming an integral annular channeled rim-structure,oppositely-disposed curved members cast integral with said flanges andextending therefrom toward each other, their convex surfaces beingtoward the tread, and means connecting said curved members with the hub.

4. A cast metal wheel, comprising a hub, a tire-supporting rim having asubstantially fiat tread portion and inwardly-directed flanges integraltherewith, forming an integral annular channeled rim-structure, op-

positely-disposed curved members cast integral with said flanges andextending therefrom toward each other, their convex surfaces beingtoward the tread, and separated members connecting said curved membersWith the hub.

, ROBERT J. BURROWS.

EDWIN B. ROSS. Witnesses:

M. M. VAULIN, N. M; CARLE'roN.

